According to Sushruta, Shalya tantra is best suited, when the problem is beyond just medicinal repair. In cases like, Arbuda (abscesses, cysts), Gandamala (enlarged lymph nodes), Mul- vyadhi (hemorrhoids), Gud-bransh (prolapse rectum), Ashmari (stones), Mutravaodh (retention of urine) and stanarog (breast diseases), Shalya tantra should be used.
The treatment would not only give faster relief to the ailing person, but also will be beneficial in situations, where Kayachikitsa will fall short.